Posted by mychelle on Thursday, December 2, 2010 at 9:50pm.
How many possible 9digit zip codes are possible if the first digit cannot be zero?

Algebra  bobpursley, Thursday, December 2, 2010 at 9:52pm
8*9^8

Algebra  Anonymous, Wednesday, May 18, 2016 at 11:44am
90,000

Algebra  AOPS user, Friday, June 10, 2016 at 3:45pm
900,000,000 aka 9*10^8
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